.bg{
  position: fixed;
  top: 0px;
  bottom: 0px;
  left: 0px;
  right: 0px;
  background-color: #21333c;
  z-index: 30000003;
}
.spinner {
  margin: 0px auto;
  width: 50px;
  height: 60px;
  text-align: center;
  font-size: 10px;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
}
 
.spinner > div {
  box-shadow: 0 0 8px 1px #03A9F4;
  background-color: #ffffff;
  height: 100%;
  width: 6px;
  display: inline-block;
   
  -webkit-animation: stretchdelay 1.2s infinite ease-in-out;
  animation: stretchdelay 1.2s infinite ease-in-out;
}
 
.spinner .rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}
 
.spinner .rect3 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}
 
.spinner .rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}
 
.spinner .rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}
 
@-webkit-keyframes stretchdelay {
  0%, 40%, 100% { -webkit-transform: scaleY(0.4) } 
  20% { -webkit-transform: scaleY(1.0) }
}
 
@keyframes stretchdelay {
  0%, 40%, 100% {
    transform: scaleY(0.4);
    -webkit-transform: scaleY(0.4);
  }  20% {
    transform: scaleY(1.0);
    -webkit-transform: scaleY(1.0);
  }
}